CALGARY  Enbridge Inc. is coping with a weekend spill of synthetic crude in northern Alberta as its head office remains closed due to severe flooding in the southern part of the province.

The spill from Line 37, about 70 kilometres southeast of Fort McMurray, Alta., caused Enbridge to shut down its Athabasca and Waupisoo pipelines a major part of the network that serves Albertas oilsands.

The 540-kilometre Athabasca line can carry up to 570,000 barrels per day of crude from the Athabasca and Cold Lake regions to Hardisty, Alta., a major pipeline hub in eastern Alberta, about 200 kilometres southeast of Edmonton.

The Waupisoo line can carry up to 600,000 barrels per day to Edmonton from Cheecham Terminal, near the site of the spill.

The company detected the Line 37 spill early Saturday and initially estimated that between 500 and 750 barrels of oil had spilled. By late morning Monday, the company hadnt responded to requests for an updat on its progress.

The release of crude comes as Alberta grapples with major flooding, including in the city of Calgary wher Enbridge has its head office, which has been closed until its safe for employees to return.

Enbridge also said that control, monitoring and operation of its liquids pipelines network is based in Edmonton and not been affected by the flooding in southern Alberta.

Enbridge said Sunday that unusually heavy rains may have resulted in a ground movement that affected Line 37, a 17-kilometre-long, 12-inch diameter pipe linking the Long Lake oilsands upgrader with the Athabasca system.

The Alberta Energy Regulator said late Sunday that it was working on the problem but hadnt confirmed the companys estimate that between 500 and 750 barrels of oil had spilled.

The AES said Enbridge had installed wildlife deterrents and contracted environmental consultants to conduct water sampling and a wildlife survey.

It said there had been no impact on wildlife observed as of Sunday.

Enbridges stock was down $1.18 or 2.7 per cent on Monday, dropping to $42.32